I could have swore there was something in the information section awile back that clarified that it was mistranslated from the japanese version, maybe im crazy but from the description it has on it now not sure if it was changed it sounds like you lose more enmity for being hit. Description is (Enmity decrease when taking damage) which would mean lowers your enmity when you get hit. I know our Pld tank doesnt use it anymore because its impossible for him to hold hate with it on he just uses the -PDT atmas now and holds hate fine.